999498 has 32 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 304640.

The previous prime is 999491. The next prime is 999499. The reversal of 999498 is 894999.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 999498.

It is not an unprimeable number, because it can be changed into a prime (999491) by changing a digit.

999498 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4063 + ... + 4301.

It is an arithmetic number, because the mean of its divisors is an integer number (68040).

2⁹⁹⁹⁴⁹⁸ is an apocalyptic number.

999498 is an abundant number, since it is smaller than the sum of its proper divisors (1177782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999498 is a wasteful number, since it uses less digits than its factorization.

999498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302.

The product of its digits is 209952, while the sum is 48.

The square root of 999498 is about 999.7489684916. The cubic root of 999498 is about 99.9832638658.

The spelling of 999498 in words is "nine hundred ninety-nine thousand, four hundred ninety-eight".